DirectShow: Refactor camera backend.

Almost entire rewrite of the camera backend. It doesn't provide new
features but is more stable and behave as it should.

- Correctly report camera state and status
- Correctly report if the camera is ready to capture
- Emit imageExposed() signal
- Save captured images in an appropriate directory
- Images can be captured even without a viewport
- Better error handling

Removed the custom QVideoWidgetControl as it doesn't provide anything more
than the QVideoWidget's renderer control fallback.

Task-number: QTBUG-33782
Change-Id: I9baf6f83e7c69619f20a101921f7865a1c90d5e4
Reviewed-by: Christian Stromme <christian.stromme@digia.com>

1 files changed, 4 insertions, 11 deletions

diff --git a/src/plugins/directshow/camera/dscameracontrol.h b/src/plugins/directshow/camera/dscameracontrol.h
index 5c7661643..36ab515bf 100644
--- a/src/plugins/directshow/camera/dscameracontrol.h
+++ b/src/plugins/directshow/camera/dscameracontrol.h
@@ -58,28 +58,21 @@ public:
     DSCameraControl(QObject *parent = 0);
     ~DSCameraControl();
 
-    void start();
-    void stop();
-    QCamera::State state() const;
+    QCamera::State state() const { return m_state; }
 
     QCamera::CaptureModes captureMode() const { return m_captureMode; }
-    void setCaptureMode(QCamera::CaptureModes mode)
-    {
-        if (m_captureMode != mode) {
-            m_captureMode = mode;
-            emit captureModeChanged(mode);
-        }
-    }
+    void setCaptureMode(QCamera::CaptureModes mode);
 
     void setState(QCamera::State state);
 
-    QCamera::Status status() const { return QCamera::UnavailableStatus; }
+    QCamera::Status status() const;
     bool isCaptureModeSupported(QCamera::CaptureModes mode) const;
     bool canChangeProperty(PropertyChangeType /* changeType */, QCamera::Status /* status */) const {return false; }
 
 private:
     DSCameraSession *m_session;
     DSCameraService *m_service;
+    QCamera::State m_state;
     QCamera::CaptureModes m_captureMode;
 };